Specifications

Command Descriptions
2-90
TDS3000, TDS3000B, and TDS3000C Series Programmer Manual
CURVe
Transfers waveform data to and from the oscilloscope in binary or ASCII format.
Formatted and interpreted according to the most recently received or transmitted
preamble. Error conditions are shown in Table 2--32.
Table 2- 31: CURVE query err or conditions
DATA:SOURCE CURVE? error
A channel which has been turned on
but not acquired
No error is generated; the returned data is entirely
NULLs
A channel, math, or reference which
has not been turned on
Waveform not turned on
Table 2- 32: CURVE command error conditions
Condition CURVE warning/error
More than 10,000 points received Too many points
Destination waveform is not a reference Invalid waveform
Each waveform transferred has an associated waveform preamble that contains
information such as data format and scale. Refer to the WFMPre? command
starting on page 2--314 for information about the waveform preamble. The data
format is specified by the DATa:ENCdg and DATa:WIDTH commands.
The CURVe? query sends data from the oscilloscope to an external device. The
data source is specified by the DATa:SOUrce command. The first and last data
points that are transferred are specified by the DATa:STARt and DATa:STOP
commands.
The CURVe command sends waveform data from an external device to the
oscilloscope. The data is stored in the stored waveform location specified by
DATa:DESTination, starting with the data point specified by DATa:STARt. Only
one waveform can be transferred at a time. The waveform will only be displayed
if the reference waveform is displayed.
A description of the waveform transfer process starts on page 2--39.
The system returns data from the last acquisition if the source is a channel
waveform that is being previewed. The data does not reflect the acquisition
preview parameters. The user should always follow acquisition parameter
changes with a single sequence OPC command prior to CURVe? to ensure the
return data reflects the new acquisition parameters.